WO2020054778A1

WO2020054778A1 - Method for manufacturing elongated body

Info

Publication number: WO2020054778A1
Application number: PCT/JP2019/035757
Authority: WO
Inventors: 渡辺　洋明
Original assignee: 株式会社潤工社
Priority date: 2018-09-11
Filing date: 2019-09-11
Publication date: 2020-03-19
Also published as: KR102343540B1; EP3852122A4; CN112955981B; US11315707B2; KR20210057112A; CN112955981A; US20220044846A1; EP3852122A1; EP3852122B1

Abstract

This method for manufacturing an elongated body is characterized by having been invented in order to manufacture an elongated body having good slipperiness, bendability, and flexibility, with little contamination of the surroundings, the elongated body being constituted from a plurality of electric wires and/or tubes, a coating layer comprising at least an intermediate layer and an outermost layer, a resin film having a density ρ1 of 0.2 g/cm³ to 1.8 g/cm³, and a value PV1, which is a surface PV value, of 5 µm or more, being used in the intermediate layer, and a resin film having a density ρ2 of 1.2 g/cm³ to 2.5 g/cm³ being used in the outermost layer, the method including at least a step for coating the elongated body with the coating layer, and a step for securing the position of the plurality of electric wires and/or tubes, a value PV2, which is the PV value of the surface of the outermost layer, satisfying formulae (1) and (3) when being equal to or less than 5 µm, and satisfying formula (2) and (3) when PV2 is greater than 5 µm. PV1 – PV2 ≥ 2 µm (1) PV2 – PV1 ≥ 0 µm (2) ρ2 – ρ1 ≥ 0.1 g/cm³ (3)

Description

Manufacturing method of long body

The present invention relates to a long body composed of an electric wire, a tube, and the like, and a method of manufacturing the same.

(4) In order to electrically connect a movable part and a fixed part of a machine tool or the like, a flat cable in which a plurality of wires, tubes, and the like are arranged in a flat shape or a twisted round cable is used. This flat cable or round cable is provided with a coating layer on the outer periphery of the cable in order to protect the cable from friction or corrosion due to external stress. Generally, such a cable often requires flexibility, and polyvinyl chloride (PVC), urethane, or an olefin-based resin is used as a material of the coating layer. However, these resins contain additives such as flame retardants, plasticizers, and antioxidants, and when used in clean rooms in semiconductor and organic EL manufacturing equipment, bleed-out of additives etc. Contamination is a problem.

Fluororesin such as polytetrafluoroethylene (PTFE) because of its excellent electrical properties such as cleanliness, slipperiness, heat resistance, nonflammability, chemical resistance, and low dielectric constant without plasticizers Is used as a material for the coating layer. Patent Document 1 (Japanese Patent Application Laid-Open No. 2006-19125) discloses that, while having excellent environmental resistance properties such as heat resistance and chemical resistance, it has excellent flexibility, flexibility, or flexibility, and good sliding. As a flat cable having a property, a flat cable using a PTFE sheet or a porous PTFE sheet for a coating layer is disclosed.

The present invention has been made in view of the above points, and an object of the present invention is to provide a method for producing a long body having good slipperiness, flexibility, and flexibility, and having less contamination to the surroundings. is there.

The above object is solved by a long body manufactured by the manufacturing method of the present invention. That is, a method for producing a long body covered with a coating layer, wherein the long body is at least composed of a plurality of wires and / or tubes, and the coating layer has at least an intermediate layer and an outermost layer. Consisting of
As the intermediate layer, a resin film having a density ρ1 of 0.2 g / cm ³ or more and 1.8 g / cm ³ or less and a peak-to-valley value PV1 of 5 μm or more is used. A resin film having a density ρ2 of 1.2 g / cm ³ or more and 2.5 g / cm ³ or less is used, and at least a step of coating the elongated body with the coating layer; And / or fixing the position of the tube, and when PV2 which is the Peak-to-Valley value of the surface of the outermost layer is 5 μm or less, the following formulas (1) and (3) are satisfied, and PV2 is 5 μm A long body manufactured by a method for manufacturing a long body covered with a coating layer, characterized by satisfying the following formulas (2) and (3) when larger.
PV1-PV2 ≧ 2 μm (1)
PV2-PV1> 0 μm (2)
ρ2-ρ1 ≧ 0.1 g / cm ³ (3)

Preferably, the intermediate layer has a porous structure. By having a porous structure, when the long body is bent, the pores in the intermediate layer are deformed, thereby reducing the load and providing high flexibility. The intermediate layer referred to in the present invention refers to a coating layer having the largest thickness among the coating layers.

Preferably, the coating layer further includes a functional layer. When at least one of the outermost layer and the intermediate layer is made of a fluororesin or the like, the adhesiveness to the mating material is often low, and providing an adhesive layer is useful because the durability of the coating layer is improved. For the adhesive layer, a resin film constituting the outermost layer or a heat-meltable resin having a lower melting point than the resin film constituting the intermediate layer can be used.

According to the present invention, it is possible to provide a long body having good slipperiness, flexibility, and flexibility, and having less contamination to the surroundings, and a method for manufacturing the same.

FIG. 1 is a schematic view of an example of a long body produced by the manufacturing method of the present invention, and is a cross-sectional view of the long body. FIG. 2 is an enlarged cross-sectional view of a portion A of the elongated body covering layer in FIG. FIG. 3 is an enlarged cross-sectional view of the covering layer portion of the long body. FIG. 4 is a schematic view of another example of the elongated body produced by the manufacturing method of the present invention, and is a cross-sectional view of the elongated body. FIG. 5 is a diagram for explaining the Peak-to-Valley value in the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The embodiments described below do not limit the claimed invention, and not all combinations of the features described in the embodiments are necessarily essential for the achievement of the present invention.

FIG. 1 is an example of a long body produced by the manufacturing method of the present invention, and is a schematic diagram of a cross section of a flat long body 100. The elongated body 100 is prepared by preparing a plurality of electric wires, tubes, or both as objects to be coated, and juxtaposed or arranged in parallel with each other. In the example of the elongated body shown in FIG. 1, the number of cores of the object to be coated is five, but is not limited to this number. The coating layer 110 is arranged so as to sandwich both sides (in the vertical direction in FIG. 1) of the object to be coated, and the portion where the coating layer 110 is bonded via the object to be coated, that is, the web portion 111 is formed of Are bonded by sintering or fusion. By the coupling of the coating layer 110, the electric wires and / or tubes of the individual objects to be coated of the elongated body 100 are held and fixed at predetermined positions.

では In an example of the elongated body produced by the manufacturing method of the present invention shown in FIG. 1, an object to be covered is one in which a plurality of electric wires, tubes, or both are arranged in parallel. The coating target 120 is one FEP electric wire here. 130 is one PFA electric wire here. Reference numeral 140 denotes a two-core parallel cable in which two FEP electric wires are arranged in parallel. Reference numeral 150 denotes a cable in which four PFA electric wires are twisted. 160 is one FEP tube here. These coating objects 120 to 160 are arranged in parallel, and a coating layer 110 is arranged above and below them. In the embodiment shown in FIG. 1, the number of objects to be covered is five, but the number of objects to be covered is not limited to this, and the objects to be covered are a single-wire covered conductor, a two-core parallel cable, and a plurality of cables. It can be selected according to the required function, such as a twisted cable, a coaxial cable, and a tube.

As another example of the elongated body produced by the manufacturing method of the present invention shown in FIG. 1, there is also a configuration of one electric wire and one tube as an object to be covered.

FIG. 2 is an enlarged cross-sectional view of the portion A of the elongated covering layer 110 of FIG. The coating layer 110 includes at least an intermediate layer 112 and an outermost layer 113.

As the intermediate layer 112, a resin film having a density ρ1 of 0.2 g / cm ³ or more and 1.8 g / cm ³ or less is used. PV1 on the surface of the resin film constituting the intermediate layer 112 is 5 μm or more. The resin constituting the intermediate layer 112 is polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), polyvinylidene fluoride ( It is preferable to use a fluororesin such as PVDF) or a polyolefin resin such as polyethylene (PE).

As described above, it is preferable to use a resin film having a density ρ1 of 0.2 g / cm ³ or more and 1.8 g / cm ³ or less for the intermediate layer 112, and 0.3 g / cm ³ or more and 1.3 g / cm ^3. It is more preferably at most 0.4 g / cm ^{3 and at most} 1.0 g / cm ³ . For example, the density of polytetrafluoroethylene (PTFE) or polyethylene (PE) resin can be controlled by the processing conditions. Since these resins can be formed into a porous structure by stretching, in order to reduce the density, after forming into a sheet, by stretching while heating, a plurality of fibrils and pores between the fibrils are formed. It can be configured as a porous structure. Basically, the density is reduced by increasing the stretching ratio. In the case of stretching by a uniaxial stretching method which is stretching from one direction, a resin film having a plurality of continuous nodes and having high physical strength can be obtained. When stretching is performed by a biaxial stretching method that is stretching from two directions, a resin film having a lower density can be obtained, and flexibility is further increased. The density can also be controlled by adjusting the firing temperature and firing time for firing the formed sheet, and adjusting the firing state to be completely fired, semi-fired, or not fired. Further, a resin film having a porous structure by foaming at the time of extrusion molding, or a resin film having a porous structure formed by mixing a resin and a solvent at a high temperature and then lowering the temperature to separate into two layers may be used.

For the outermost layer 113, a resin film having a density ρ2 of 1.2 g / cm ³ or more and 2.5 g / cm ³ or less is used.
The resin used for the outermost layer 113 is PTFE, tetrafluoroethylene-perfluoroalkylvinylether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), or tetrafluoroethylene-ethylene copolymer ( It is preferably a resin containing no plasticizer, such as a fluororesin such as ETFE) or polychlorotrifluoroethylene (PCTFE), or a polyetheretherketone (PEEK) or polyimide (PI). Generally, a resin film having a thickness of 5 μm to 100 μm is used for the outermost layer.

When PV2 on the surface of the resin film forming the outermost layer 113 is 5 μm or less, PV1 on the surface of the resin film forming the intermediate layer 112 and PV2 on the surface of the resin film forming the outermost layer 113 are PV1−PV2 ≧ 2 μm. And a resin film in which the density ρ2 of the resin film forming the outermost layer and the density ρ1 of the resin film forming the intermediate layer 112 satisfy the relationship of ρ2−ρ1 ≧ 0.1 g / cm ^3. . Further, when the surface PV2 of the resin film constituting the outermost layer 113 is larger than 5 μm, the outermost layer 113 has PV1 and PV2 satisfying the relationship of PV2−PV1> 0 μm, and at the same time, the resin film constituting the outermost layer. Is used, the density ρ2 of the intermediate layer 112 and the density ρ1 of the resin film constituting the intermediate layer 112 satisfy a relationship of ρ2−ρ1 ≧ 0.1 g / cm ³ . The relationship between PV1 and PV2 suitable for the present invention is switched when PV2 on the surface of the elongated body made by the manufacturing method of the present invention is exactly 5 μm. Here, the case where ρ2-ρ1 ≧ 0.3 g / cm ³ or more is preferable, and the case where ρ2-ρ1 ≧ 1.0 g / cm ³ or more is more preferable.

The long object manufactured by the manufacturing method of the present invention can solve the problem of the present invention by the above-described configuration. While having high flexibility, it is possible to reduce the adhesion of foreign substances remaining on the surface of the coating layer, and it is possible to handle a small amount of oil and surroundings during cable handling, assembly and installation processes, equipment operation, etc. Foreign substances such as particles, chemicals, and moisture in the surrounding air are difficult to adhere to and are easily removed. Therefore, when placed in a clean environment, there is little contamination to surroundings, and there is little generation of dust and the like due to outgassing and wear of the long body itself, so that a long body that does not pollute the surroundings can be obtained.

FIG. 3 shows another example of the elongated body coating layer formed by the manufacturing method of the present invention. The covering layer may be provided with a functional layer in addition to the intermediate layer and the outermost layer. The covering layer 110a has an adhesive layer 114 # a disposed between the intermediate layer 112a and the outermost layer 113a, and increases the adhesive force between the intermediate layer 112a and the outermost layer 113a to slide the elongated body. The durability of the coating layer 110a is increased. Further, another adhesive layer 114a is disposed on the surface of the intermediate layer 112a opposite to the outermost layer 113a side, and when joining the covering layers 110a, a resin film or an outermost layer constituting the intermediate layer 112a is formed. The bonding and integration can be performed at a temperature lower than the melting point of the resin film constituting the layer 113a. Since the resin film constituting the intermediate layer 112a and the resin film constituting the outermost layer 113a can be joined at a temperature at which the influence is small, the high function of the covering layer 110a can be maintained and high durability can be obtained. . For the adhesive layer, it is possible to use a heat-meltable fluororesin or an olefin resin such as polyethylene. In addition to the adhesive layer, a functional layer can be provided in accordance with the function required by the elongated body, such as a solvent barrier property.

FIG. 4 is a cross-sectional view of a round elongated body according to an example of the embodiment of the present invention. The covering layer 210 of the elongated body 200 includes an outermost layer 211, an intermediate layer 212, and an adhesive layer 213. As the object to be coated, one or more of an electric wire, a tube, or both of them are twisted and used. 220 is one FEP electric wire here. Reference numeral 230 denotes a cable in which seven PFA electric wires are twisted. 240 is a cable in which two FEP electric wires are twisted in this case. Reference numeral 250 denotes one PFA electric wire here. Here, 260 and 270 are a single nylon tube, and 280 is a tinned annealed copper wire (drain wire). These 220 to 280 are twisted, and the coating layer 210 is wound around the outer periphery thereof. After winding, the overlapping portions of the tape are joined by heating. By the connection of the coating layer 210, the electric wires and / or tubes of the individual objects to be coated of the elongated body 200 are held and fixed at predetermined positions. The configuration and number of electric wires and tubes to be coated are not limited to the examples shown here, and one or a plurality of electric wires may be twisted or may be arranged in parallel. Further, a part of the twisted electric wire may be constituted by a tube.

The present invention is described in more detail in the following examples. The embodiments described below do not limit the invention according to the claims.

<Measurement of Peak-to-Valley value (PV)>
For the measurement, a white interference microscope New view 6300 manufactured by Zygo was used. A white LED was used as a light source, and a Gaussian filter was applied for surface filtering. The measurement resolution in the height direction is 0.1 nm. The observation magnification was set to 50 times, the cutoff frequency on the high frequency side (Filter High Wavelength) was set to 0.00250 mm, and the cutoff frequency on the low frequency side (Filter Low Wavelength) was set to 0.80000 mm. The shape of the surface was measured, and a Peak-to-Valley value (PV) was calculated. Analysis software MetroPro was used for the analysis of the measurement data. FIG. 5 is a diagram for explaining a PV in the present invention, and is shown using an example of surface profile data obtained by measurement. As shown in FIG. 5, PV refers to the distance in the height direction between the highest point and the lowest point on the measurement surface.
<Measurement of density ρ>
The specific gravity measured at room temperature by DENSIMETER H manufactured by Toyo Seiki Seisakusho in accordance with the underwater replacement method of JIS K 6301 was adopted as the density.
<Evaluation of cleanliness>
Regarding the adhesion of the foreign matter to the long body, the poor adhesion of the foreign matter and the ease of removal were evaluated. For the hard adhesion and easy removal, the ink was applied to the surface, the adhesion was checked, and the amount of the ink component remaining when the ink was wiped off with a cotton cloth was checked. The adhesion state of the ink components and the remaining amount of the ink were evaluated on a five-point scale. The ink component did not adhere to 5, the ink component adhered slightly, and the ink component was completely removed by wiping, and the ink component was completely removed. The sample was identified as 3, the ink was attached, and the trace of the ink was confirmed even after wiping, and 2 was the sample where the ink was attached and the ink was hardly removed even after wiping.

[Example 1]
A PTFE resin film was used as the outermost layer, and another PTFE resin film was used as an intermediate layer inside the PTFE resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, two resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 2]
A PTFE resin film as an outermost layer, a 0.02 μm-thick FEP resin film as an inner adhesive layer, another PTFE resin film as an intermediate layer further inside, and a further PTFE resin film as an inner adhesive layer. An FEP resin film having a thickness of 0.02 μm was used. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, the four resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 3]
A PTFE resin film as an outermost layer, a 0.02 μm-thick FEP resin film as an inner adhesive layer, another PTFE resin film as an intermediate layer further inside, and a further PTFE resin film as an inner adhesive layer. An FEP resin film having a thickness of 0.02 μm was used. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, the four resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 4]
An FEP resin film was used as the outermost layer, a PTFE resin film was used as an intermediate layer inside the FEP resin film, and a 0.02 μm-thick FEP resin film was used as an adhesive layer inside the FEP resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, three resin films were laminated and heated to form a coating layer. As an object to be coated, a cable in which four PFA electric wires were twisted together and one in which four FEP electric wires were twisted were prepared. The coating layer was wound around the outer periphery so as to overlap doubly, and heated to fix the position of each object to be coated, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 5]
A PEEK resin film was used as an outermost layer, a PTFE resin film was used as an intermediate layer inside the PEEK resin film, and a 0.02 μm-thick FEP resin film was used as an adhesive layer inside the PEEK resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, three resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 6]
A PTFE resin film was used as an outermost layer, and a PE resin film was used as an intermediate layer inside the PTFE resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 1.
Next, two resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
The evaluation results of the cleanness are shown in Table 1.
[Example 7]
A PTFE resin film was used as the outermost layer, and another PTFE resin film was used as an intermediate layer inside the PTFE resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, two resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.
Example 8
An FEP resin film was used as the outermost layer, a PTFE resin film was used as an intermediate layer inside the FEP resin film, and a 0.02 μm-thick FEP resin film was used as an adhesive layer inside the FEP resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, three resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.
[Example 9]
A PTFE resin film was used as an outermost layer, another PTFE resin film was used as an intermediate layer inside the PTFE resin film, and a 0.02 μm-thick FEP resin film was used as an adhesive layer inside the PTFE resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, three resin films were laminated and heated to form a coating layer. As an object to be coated, a cable in which four PFA electric wires were twisted together and one in which four FEP electric wires were twisted were prepared. The outer periphery was wound and coated so that the coating layer overlapped twice, and heated to fix the position of each object to be coated, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.
[Example 10]
A PTFE resin film as the outermost layer, a 0.02 mm-thick FEP resin film as an inner adhesive layer, another PTFE resin film as an intermediate layer further inside, and a further inner thickness adhesive layer. A 0.02 mm FEP resin film was used. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, the four resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP electric wire, one FEP electric wire, one cable in which four PFA electric wires are twisted, one cable in which two PFA electric wires are twisted, and one FEP tube in a horizontal direction. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.
[Example 11]
A PEEK resin film was used as the outermost layer, a PTFE resin film was used as an intermediate layer inside the PEEK resin film, and a 0.02 mm thick FEP resin film was used as an adhesive layer inside the PEEK resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, three resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP wire, one FEP wire, one cable in which four PFA wires are twisted, one cable in which two PFA wires are twisted, and one FEP tube are placed horizontally. Arranged. A coating layer was arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.
[Example 12]
A PTFE resin film was used as an outermost layer, and a PE resin film was used as an intermediate layer inside the PTFE resin film. The resin film was prepared by cutting to a required width. The thickness, PV, and density of each of the resin films of the outermost layer and the intermediate layer were measured. The results are shown in Table 2.
Next, two resin films were laminated and heated to form a coating layer. In preparation for the object to be covered, one FEP wire, one FEP wire, one cable in which four PFA wires are twisted, one cable in which two PFA wires are twisted, and one FEP tube are placed horizontally. Arranged. Coating layers were arranged above and below the arranged coating objects, and the web portion was heated to fix the position of each coating object, thereby producing a long body.
Table 2 shows the evaluation results of the cleanliness.

In each of the examples, good results were obtained in which the flexibility and flexibility were good, the cleanliness was high, the contaminants generated from the long coating layer itself were small, and the surroundings were less contaminated.

The elongated body of the present invention has good slipperiness, flexibility, and flexibility, and has little contamination to the surroundings, so that it can be used for semiconductor manufacturing equipment or measuring equipment requiring cleanliness. is there.

100 mm long body (flat shape), {110} covering layer, {112} intermediate layer, {113} outermost layer, 200 mm long body (round shape), {210} covering layer}

JP 2006-19125 A

Claims

A method for producing a long body covered with a coating layer, wherein the long body is constituted by at least a plurality of electric wires and / or tubes, and the covering layer comprises at least an intermediate layer and an outermost layer. ,
As the intermediate layer, a resin film having a density ρ1 of 0.2 g / cm 3 or more and 1.8 g / cm 3 or less and a peak-to-valley value PV1 of 5 μm or more is used. A resin film having a density ρ2 of 1.2 g / cm 3 or more and 2.5 g / cm 3 or less is used, and at least a step of coating the elongated body with the coating layer; And / or fixing the position of the tube, and when PV2 which is the Peak-to-Valley value of the surface of the outermost layer is 5 μm or less, the following formulas (1) and (3) are satisfied, and PV2 is 5 μm A method for producing a long body covered with a coating layer, characterized by satisfying the following formulas (2) and (3) when larger.
PV1-PV2 ≧ 2 μm (1)
PV2-PV1> 0 μm (2)
ρ2-ρ1 ≧ 0.1 g / cm 3 (3)
The method according to claim 1, wherein the intermediate layer has a porous structure including a plurality of pores.
The method for producing a long body covered with a coating layer according to claim 1 or 2, wherein the coating layer further includes a functional layer.